Synthesis and Studies of Magnetic Layered Host-Guest Materials

磁性层状主客体材料的合成与研究

• 批准号: 9311597
• 负责人: Daniel Nocera
• 金额: $ 30万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311597&HistoricalAwards=false
• 关键词: Synthesis; Studies; Magnetic; Layered; Host

9311597 Nocera This proposal is motivated by the challenge of rationally designing magnetic substances. This research will exploit the structural control available in layered materials to study the interplay between molecular interactions and magnetic coupling. The intracrystalline environments of phosphate layered hosts will provide the scaffolding to position organic inorganic intercalants in well-defined relationships to the layers and to each other. Magnetic intercalates of layered phosphate and phosphonate hosts will be synthesized by redox and ion-exchange intercalation methods. Insertion of specially designed isostructural organic and inorganic sets of para- or diamagnetic guests will permit the probe of intralayer, layer-guest, guest-guest, and higher order magnetic interactions. In the case of paramagnetic intercalants, the roles of the open-shell orbitals' shape and alignment relative to the layers can be assessed in connection with quest orientation within the galleries. Finally, an exploratory path is outlined to assemble magnetic host layers about paramagnetic quests. As this proposal addresses structural issues of magnetic coupling, new strategies for the rational design of materials with magnetically tailored properties will emerge. Additionally, the structure- magnetism correlations assembled in this layered magnetic materials synthesis program will provide impetus for the development of new predictive structural theories of magnetism. Although the primary focus of the proposed work is synthetic, development of mechanistic models will be pursued as needed within an established collaboration with the condensed matter physics group at the University. ***

9311597 Nocera 该提案的动机是合理设计磁性物质的挑战。 这项研究将利用层状材料中可用的结构控制来研究分子相互作用和磁耦合之间的相互作用。 磷酸盐层状基质的晶内环境将提供支架，以将有机无机嵌入剂定位在各层之间以及彼此之间的明确关系中。 层状磷酸盐和膦酸盐主体的磁性插层将通过氧化还原和离子交换插层方法合成。 插入专门设计的同构有机和无机顺磁性或反磁性客体组将允许探测层内、层客体、客体-客体和更高阶的磁相互作用。 在顺磁插层的情况下，开壳轨道的形状和相对于层的排列的作用可以结合画廊内的探索方向进行评估。 最后，概述了一条探索性路径，用于组装有关顺磁任务的磁性宿主层。 由于该提案解决了磁耦合的结构问题，因此将会出现合理设计具有磁性定制特性的材料的新策略。 此外，在该层状磁性材料合成程序中组装的结构-磁性相关性将为新的磁性预测结构理论的发展提供动力。 尽管拟议工作的主要重点是综合性的，但将根据需要在与大学凝聚态物理小组的既定合作中寻求机械模型的开发。 ***